One year after intersection safety cameras were installed, the odds of a red light running violation at the camera locations went down. Violations occurring at least 0.5 seconds after the light turned red were 39 percent less likely, violations occurring at least 1 second after were 48 percent less likely, and the odds of a violation occurring at least 1.5 seconds into the red phase fell 86 percent.

Insurance Institute for Highway SafetyIntersection safety cameras reduced fatal red light running crashes by an average of 24% in the 14 largest cities using them between 2004 and 2008. 159 lives were saved in these 14 cities in four years.

Researchers examined crash records at 275 Texas intersections and found safety cameras led to an 11% reduction in overall crashes, a 25% reduction in red light-related crashes and a 32% reduction in T-bone crashes.

In Philadelphia, intersection safety cameras on top of lengthening yellow timing further reduced red light violations by 96% beyond levels achieved by longer yellow light timing.Red Light Cameras: Do they change driver behavior and reduce accidents?Louisiana State UniversityBefore the installation of traffic enforcement cameras, 2,428 citations were given per week at an intersection with the highest accident rate in Louisiana, but dropped to 356 citations per week after traffic safety cameras were installed and running for eight months